Title:
【発明の名称】白色マイクロシリカの製造方法
Document Type and Number:
Japanese Patent JP2821652
Kind Code:
B2
Abstract:
The present invention relates to a method for producing microsilica having a reflectivity between 65 and 90 % in a smelting furnace for production of ferrosilicon or silicon by using a charge comprising an SiO2-source and a solid carbonaceous reduction agent, where microsilica is recovered from the off-gases from the smelting furnace, wherein the solid reduction agent supplied to the furnace contains an amount of volatile matters of less than 1.25 kg per kg produced microsilica and that the temperature in the gas atmosphere in the furnace above the charge is kept above 500 DEG C.
Inventors:
Dostall, Magne
Tolvate, Halve Aldo
Ding Soil, Elder, Oh.
Longing, pair
Horsakea, Svein
Tolvate, Halve Aldo
Ding Soil, Elder, Oh.
Longing, pair
Horsakea, Svein
Application Number:
JP50575894A
Publication Date:
November 05, 1998
Filing Date:
July 19, 1994
Export Citation:
Assignee:
Elchem Eyesei
International Classes:
C01B33/025; C01B33/18; C04B18/14; C22C33/04; C22C29/00; (IPC1-7): C01B33/18
Domestic Patent References:
| JP3775B1 | ||||
| JP4540163B1 |
Attorney, Agent or Firm:
Shigeru Yagita (1 outside)